After rendered, how do I find a node with either name of ABC or better yet ID of 1. (also do I need to have ID as gridcolumn dataIndex to find by id or model def good enough?) I'm trying to select category of an item preselected to be submitted along with form data.

of course.. without success! :-) I must be doing wrong, if you can punch me to the direction please..
Model of this treestore has idProperty: set to 'id' which is populated (i'm checking from designer/json viewer).
But I did not put ID as one of the treepanel's grid column (tree is treegrid).
I am assuming this is not a problem? as long as the store has id even though not displayed from tree?

(this is another issue) Another thing I am kind of suspecting is that tree.expandAll() only opens partially. I think I'm calling it too quick after render? (call from afterrender of treepanel) Or do I need to call multiple times to open all sub nodes?